<ins>: 插入文本元素

<p>&ldquo;You're late!&rdquo;</p>
<del>
  <p>&ldquo;I apologize for the delay.&rdquo;</p>
</del>
<ins cite="../how-to-be-a-wizard.html" datetime="2018-05">
  <p>&ldquo;A wizard is never late &hellip;&rdquo;</p>
</ins>

del,
ins {
  display: block;
  text-decoration: none;
  position: relative;
}

del {
  background-color: #ffbbbb;
}

ins {
  background-color: #d4fcbc;
}

del::before,
ins::before {
  position: absolute;
  left: 0.5rem;
  font-family: monospace;
}

del::before {
  content: "−";
}

ins::before {
  content: "+";
}

p {
  margin: 0 1.8rem;
  font-family: "Georgia", serif;
  font-size: 1rem;
}

ins::before,
ins::after {
  clip-path: inset(100%);
  clip: rect(1px, 1px, 1px, 1px);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

ins::before {
  content: " [insertion start] ";
}

ins::after {
  content: " [insertion end] ";
}

<ins>This text has been inserted</ins>